Pendulum pile-driver.



E. J. STONE.

PENDULUM PILE DRIVER. APPLICATION FILED JUNE I6, 1916.

Patented Dec. 25, 1917.

2 SHEETS-SHEET I.

WITNESSES l- INVENTOR.

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A 110mm Y a% iii ZZZ? E. J. STONE.

PENDULUM PILE DRIVER.

APPLICATION FILED JUNE 16. 1916.

1 ,25 1 1 3 1 Patented Dec. 25, 1917.

2 SHEETS-SHEET 2.

WITNESSES: INVENTOR.

A TTORNE Y EDWARD J". STONE, OF DULUTH, MDTNESOTA.

PENDULUM FILE-DRIVER.

Specification of Letters Patent.

Patented Dec. 25, 1917.

Application filed J une 16, 1916. Serial No. 104,140.

To all whom it may concern Be it known that I, EDWARD J. STONE, a citizen of the United States, residing at Duluth, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements Pendulum Pile- Drivers, of which I do hereby declare the following to be a specification.

My invention relates to pendulum pile drivers and has for its object an improved construction of pendulum frame, so that the are through which it may be swung may be extended and piles driven at a greater angle or batter than has heretofore been practicable.

In the drawings, Figure 1, is a front elevation of a portion of a pendulum frame showing my said invention and showing a portion of an A-frame and yoke upon which said pendulum frame is swung. Fig. 2 is a rear elevation of the same, and Fig. 3 is a side elevation of the same.

In the drawings, 1 is an A-frame provided at its upper end with a suitable cap 2, to which is pivoted as by a pivot 3, a pendulum frame, including hammer leads orguides 4, 4 for a gravity hammer (not shown), and main ladder posts 5, 5, secured to said hammer leads in any suitable manner and by any suitable means, as by cross ties 6, 6, and to each other by cross ties or ladder rings 7, 7. Said pendulum frame is further supported on said A-frame by means of a yoke 3 Hcretofore each of the ladder posts has been straight, with the result that, when the pendulum frame was swung a short distance on its pivotal axis, one or the other of the main ladder posts would contact with the side of the A-frame, thus materially limiting the angle to which the pendulum frame could be swung laterally from a vertical position. Further it has not been found desirable in practice to construct the pendulum frame of very great width throughout its length.

In order to permit of a materially greater swing of the pendulum frame, I form in each ladder post a laterally and outwardly bowed section as 5, 5 of any suitable length extending past the points at which the swinging radius of said pendulum frame intersects said A-frame or the guy lines 8, 8, of said A-frame. In order to provide a support for a by-pass or side ladder, extending past said bowed portion, I insert a supplementary ladder post 5 between the main ladder post 5 and the hammer guide 4, at either or each side of the pendulum frame, and secure rings 7 to said post 5 and to the outer side of the adjoining one of the hammer leads.

My invention permits of the swinging of the pendulum frame laterally at a materially greater angle from vertical and thus permits of the driving of piles at a greater angle or batter than would otherwise be possible. This gain in the range of angle at which piles may practically be driven is of very material value.

What I claim is:

1. The combination with an inclined A- frame, of a pendulum frame supported upon the upper end of said A-frame, said pendulum frame being adapted to swing in a vertical plane at an angle to the central vertical longitudinal plane of said A-frame, said pendulum frame having formed therein laterally and outwardly bowed portions at each side of said A-frame and extending past the points at which the swinging radius of saidpendulum frame intersects said A-frame.

2. The combination with an inclined supporting member, of a pendulum frame supported upon the upper end thereof and adapted to swing in a vertical plane at an angle to the central vertical longitudinal plane of said inclined member, said pendulum frame including hammer-guides and ladder posts, said ladder posts having formed therein laterally and outwardly bowed portions extending past the points at which the swinging radius of said posts intersects said inclined supporting member.

In testimony whereof, I hereunto aflix my signature in presence of two witnesses.

I EDWARD J. STONE.

Witnesses:

R. \V. STONE, A. I. STONE.

copies of this patent my be obtained for five cents each. by addressing the "Commissioner of Patents,

Wuhington, D. 0. Y 

